title: Modeling column regeneration effects on ion-exchange chromatography.
abstract: The effect of in-place regeneration on equilibrium and kinetic characteristics of the adsorption of bovine serum albumin to a DEAE-cellulose anion exchanger has been determined. Regeneration with sodium hydroxide and time of exposure showed no effect on equilibrium behavior. Breakthrough curves were measured for protein adsorption on fixed-bed columns and analyzed by a simple model to determine the relevant rate constants for the adsorption process. It was found that forward adsorption rate constant decreased exponentially with the chemical treatment exposure time. The implications of the results on the design and optimization of ion-exchange chromatographic processes are discussed.
authors.affiliation: Departamento de Investigaciones Científicas y Tecnológicas, Universidad de Sonora, Mexico.
authors.forename: Z K
authors.initials: ZK
authors.lastname: López
authors.forename: A
authors.initials: A
authors.lastname: Tejeda
authors.forename: R M
authors.initials: RM
authors.lastname: Montesinos
authors.forename: I
authors.initials: I
authors.lastname: Magaña
authors.forename: R
authors.initials: R
authors.lastname: Guzmán
mesh_terms: D000327:Adsorption; D000818:Animals; D002417:Cattle; D002848:Chromatography, DEAE-Cellulose / Q000295:instrumentation / Q000379:methods*; D006851:Hydrochloric Acid / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D009994:Osmolar Concentration; D011485:Protein Binding; D012709:Serum Albumin / Q000737:chemistry* / Q000378:metabolism; D012972:Sodium Hydroxide / Q000737:chemistry*
chemical_list: D012709:Serum Albumin; D012972:Sodium Hydroxide; D006851:Hydrochloric Acid